Atractides (Atractides) hormozganus, Pešić & Smit & Saboori, 2012

Pešić, Vladimir, Smit, Harry & Saboori, Alireza, 2012, 3330, Zootaxa 3330, pp. 1-67 : 36-40

Atractides (Atractides) hormozganus sp. nov.

( Figs. 25A – F, 26A – D, 27A – D)

Material examined. Holotype male, dissected and slide mounted, Iran, Hormozgan Province, IR21-2011, Rudan city N of Bandar Abbass, 5 km N of Rudan, Rudan stream, lotic part, 27º 28.226 N, 57º 15.153 E, 200 m asl, 21.vii.2011 ( RMNH) . Paratypes: 19/15/2, same data as holotype, 2/1/1 mounted; 1/1/0, IR22-2011, Rudan stream, interstitial dig, 27º 28.748 N, 57º 15.648 E, 210 m asl, 21.vii.2011 (all RMNH) .

Further records. Iran, Hormozgan Province, IR18-2011, Taleguerdoo village N of Bandar Abbass, Poshtekeno spring, upper part of stream, 27º 48.783 N, 56º 24.459 E, 836 m asl, 18.vii.2011 3/3/0 (1/1/0 mounted) ; IR19- 2011, Banglayan village , stream, 27º 45.695 N, 56º 32.402 E, 577 m asl, 18.vii.2011 2/3/0 ; Sistan Province, IR11- 2011, Hootgat Bala river near Dargas village , NE of Chabahar, upstream, 25º 49.539 N, 61 º31.033 E, 65 m asl, 14.vii.2011 1/1/0 (1/0/0 mounted) .

Diagnosis. Dorsal integument striated; muscle attachment plates smooth; genital field in male with anterior margin medially with more or less protruding border of secondary sclerotization; palp slender (L/H ratio P-2 1.4 – 1.6, P-4 3.8 – 4.1 in both sexes, P- 3 ♂ 1.7 – 1.9, ♀ 2.3 – 2.4), P-4 ventral margin divided by hair insertions into sectors 2:3:2; I-L-5 smaller (L ♂ 146 – 171, ♀ 204 – 220, L ratio I-L-5/6 1.1 – 1.2).

General features. Dorsal integument striated; muscle attachment plates smooth. Coxal field: mediocaudal margin of Cx-I+II with a large, slightly concave area between the laterally directed apodemes of Cx-II. Genital field: Ac in a weakly curved line. Excretory pore smooth; Vgl-1 not fused to Vgl-2. Palp: weak sexual dimorphism, P-2 ventral margin weakly S-shaped, convex in distal part, P-4 ventral hairs long, sword seta close to distoventral hair. I-L-5: S-1 and -2 strongly heteromorphic and distanced, ventral seta close to insertion of S-1, I-L-6 curved and slender, strongly narrowed in the centre, slightly thickened distally.

Description. Male (holotype, in parentheses measurements of paratypes, n = 2; in square brackets specimen from IR18-2011) — Idiosoma L/W 538 (480 – 494) [506]/380 (341 – 366) [375]. Coxal field ( Fig. 25A): L 278 (252 – 259) [288], Cx-III W 305 (278 – 283) [322], Cx-I+II mL 77 (66 – 69) [80], Cx-I+2 lL 179 (156 – 162) [177]. Genital field ( Figs. 25A, C – D): L/W 74 (71 – 75) [80]/84 (73 – 80) [85], anterior margin medially with more or less protruding border of secondary sclerotization, rarely straight, posterior margin straight, not indented, lateral margin weakly indented between Ac-2 and Ac-3, Ac-3 distanced from anterior two acetabula on each side, L Ac-1-3: 18 – 19 (15 – 20) [19 – 22], 17 – 20 (19 – 22) [21 – 23], 17 – 19 (17 – 19) [16 – 17]. Ejaculatory complex ( Fig. 25B) L 94 (91).

Palp ( Figs. 25E – F): palp total L 270 (267) [268], dL: P-1, 27 (24 – 26) [28]; P-2, 62 (55 – 61) [63]; P-3, 66 (61 – 66) [64]; P-4, 89 (81 – 87) [87]; P-5, 26 (27 – 28) [26]; L P-2/P-4 ratio, 0.7 (0.67 – 0.7) [0.72].

I-L ( Fig. 26A – B): I-L-5 dL 168 (146 – 157) [171], vL 94.6 (84 – 88) [100], dL/vL 1.78 (1.74 – 1.78) [1.71], HB 42.2 (35 – 41.5) [41], dL/HB 3.98 (3.78 – 4.2) [4.17], S-1 L 95 (82 – 88) [85], L/W 8.8 (9.6 – 9.7) [10.0], S-2 L 64 (60 – 63) [60], L/W 5.0 (5.7 – 6.5) [5.2], S-1-2 distance 29 – 30 (26 – 28) [28 – 29], L ratio S-1/2 1.49 (1.37 – 1.39) [1.41]; I-L- 6 L 147 (129 – 136) [144], HB 16 (15) [16], L/HB 9.04 (8.5 – 8.9) [9.06]; L I-L-5/6 1.15 (1.13 – 1.15) [1.17].

Female (paratype, n = 1; in parentheses specimen from IR18-2011) — Idiosoma L/W 766 (747)/550 (503). Coxal field ( Fig. 27A): L 308 (334), Cx-III W 355 (394), Cx-I+II mL 79 (83), Cx-I+II lL 184 (197). Genital field ( Fig. 27B): L/W 142/137, genital plates slightly indented between Ac, genital plate L 77 – 82 (84), L Ac-1-3: 22 (20 – 21), 22 – 23 (22), 23 – 25 (28).

Palp ( Fig. 27D): palp total L 316 (335), dL: P-1, 33 (34); P-2, 71 (79); P-3, 82 (85); P-4, 100 (106); P-5, 30 (31); L P-2/P-4 ratio, 0.71 (0.75).

I-L ( Fig. 27C): I-L-5 dL 204 (220), vL 102 (112), dL/vL 2.0 (2.0), HB 55 (61), dL/HB 3.72 (3.62), S-1 L 108 (123), L/W 8.8 (8.9), S-2 L 68 (71), L/W 3.7 (3.23), S-1-2 distance 53 (52), L ratio S-1/2 1.6 (1.73); I-L-6 L 170 (188), HB 16 (16), L/HB 10.6 (11.5); L I-L-5/6 1.2 (1.17).

Deutonymph (collected together with adults of Atractides hormozganus at IR21-2011 and suspected to represent this species) — Idiosoma L/W 406/253; integument dorsally striated; muscle attachments unsclerotized. Coxal field: L 181, Cx-III W 215, Cx-I+II mL 45, Cx-I+II lL; provisional genital field with two pairs of Ac, L/W 37/48; excretory pore smooth; Vgl-1 not fused to Vgl-2.

Palp ( Fig. 26C): palp total L 175, dL: P-1, 15; P-2, 42; P-3, 43; P-4, 57; P-5, 18; L P-2/P-4 ratio, 0.74.

I-L ( Fig. 26D): I-L-5 dL 94, vL 69, dL/vL 1.36, HB 29, dL/HB 3.24, S-1 L 52, L/W ratio 8.4, S-2 L 51, L/W ratio 6.6, S-1-2 distance 0, L ratio S-1/2 1.02; I-L-6 L 79, HB 15, L/HB 5.4; L I-L-5/6 1.2.

Etymology. Named for its occurrence in Hormozgan Province.

Remarks. Due to the similar morphology of the genital field (relatively small Ac arranged in a weakly curved line, male genital field apple-shaped with Ac-3 distanced from Ac-1 and -2), I-L-5 and -6 (S-1 and S-2 with relatively wide setal interspace, I-L-6 strongly curved and slender) and palp (without sexual dimorphism, P-2 ventral margin slightly S-shaped in the both sexes), A. hormozganus sp. nov. is most similar to A. nikooae Pešić, 2004 , a species known from both sexes from the Markazi Province (Pešić et al. 2004). From the latter species, A. hormozganus differs in both sexes in smaller dimensions of I-L-5 (dL/H ♂ 196/50, ♀ 252/ 77 in A. nikooae ), and more slender palp segments (L/H ratio: P-2, 1.4 – 1.6, P-4, 3.8 – 4.1 in both sexes, P- 3 ♂ 1.7 – 1.9, ♀ 2.3 – 2.4 vs. P-2, 1.2 – 1.3, P-4, 3.3 – 3.5 in both sexes, P- 3 ♂ 1.5, ♀ 2.0 in A. nikooae , measurements taken from the type material). Moreover, the ventral margin of P-4 is divided by hair insertions in three sections with a ratio of 2:3:2 (2:2: 3 in A. nikooae ). Further differences are found in a more slender S-2 (L/W ratio 4.4) in the female of A. nikooae , a shorter medial suture line of Cx-I+II in A. hormozganus (in A. nikooae L ♂ 100, ♀ 135) and the genital field anterior margin medially with a more or less protruding border of secondary sclerotization in the male of A. hormozganus (concave in A. nikooae ).

Habitat. Most specimens were collected in the lotic part of sandy/bouldery streams, with strong exposure to sunlight ( Figs. 44C – D); only a few specimens were found in an interstitial dig.

Distribution. Iran (Hormozgan Province).